13912857 has 16 divisors (see below), whose sum is σ = 23556480. Its totient is φ = 7950096.

The previous prime is 13912841. The next prime is 13912859. The reversal of 13912857 is 75821931.

It is not a de Polignac number, because 13912857 - 2⁴ = 13912841 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (13912859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36618 + ... + 36995.

It is an arithmetic number, because the mean of its divisors is an integer number (1472280).

Almost surely, 2^13912857 is an apocalyptic number.

It is an amenable number.

13912857 is a deficient number, since it is larger than the sum of its proper divisors (9643623).

13912857 is an equidigital number, since it uses as much as digits as its factorization.

13912857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73629 (or 73623 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 13912857 is about 3729.9942359205. The cubic root of 13912857 is about 240.5131209137.

It can be divided in two parts, 139 and 12857, that added together give a square (12996 = 114²).

The spelling of 13912857 in words is "thirteen million, nine hundred twelve thousand, eight hundred fifty-seven".